package com.etoak.controller;

import cn.hutool.core.util.IdUtil;
import cn.hutool.core.util.StrUtil;
import com.etoak.common.core.exception.CustomException;
import com.etoak.common.core.properties.ImageProperties;
import com.etoak.common.core.vo.ResultVO;
import org.apache.commons.lang3.ObjectUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/upload")
public class UploadController {

    @Autowired
    ImageProperties imageProperties;

    @PostMapping("/image")
    public ResultVO<String> uploadImage(MultipartFile pic){
        // 1.判断是否为空
        if(ObjectUtils.isEmpty(pic) || pic.isEmpty()){
            throw new CustomException("文件不允许为空");
        }

        // 2. 判断文件的类型
        String contentType = pic.getContentType();
        if(!imageProperties.getTypeList().contains(contentType)){
            String types = imageProperties.getTypeList().stream()
                    .map(x -> x.split("/")[1])
                    .collect(Collectors.joining(","));
            throw new CustomException("仅允许"+ types + "类型的文件");
        }

        // 3 创建上传目录
        String location = imageProperties.getLocation();
        File parent = new File(location);
        if (!parent.exists()){
            parent.mkdirs();
        }

        // 4 创建上传的文件名称
        String originalFilename = pic.getOriginalFilename();
        String fileName = IdUtil.simpleUUID() + originalFilename.substring(originalFilename.lastIndexOf(StrUtil.DOT));

        File target = new File(parent, fileName);

        // 5 上传
        try {
            pic.transferTo(target);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

        // 6 返回
        String result = imageProperties.getPrefix().endsWith(StrUtil.SLASH)?
                imageProperties.getPrefix() + fileName :
                imageProperties.getPrefix() + StrUtil.SLASH + fileName;
        return ResultVO.success(result);
    }
}
